Robust metal strip able to withstand high temperature and high current.
Low TCR and Inductance
Resistance Range from 0.5 mΩ to 50 mΩ
Power ratings from 1W to 3W in 1206, 2010 and 2512 chip size
Designed for current sense circuits in power electronic systems
Higher wattage devices feature PCB clearance gap to maximize thermal
performance
Electrical Data
IRC Type
Coating
1
Power rating
at 80°C (Watts)
Standard Resistance
Values (mΩ)
2
TCR
Tolerance
Dielectric
(±ppm/°C)
(±%)
Withstanding Voltage
(Volts)
50
100
75
50
50
50
50
100
50
75
100
1, 5
200
1, 5
100
1, 5
100
1206 Chip Size
ULRG1
ULRB1
Green
Black
1
1
1 - 10
5, 10
20, 25
1 - 10
11 - 15
7 - 10
4-6
0.5 - 0.75
1-3
11, 12, 15, 18, 20, 25, 30,
33, 40, 50
1, 1.5, 2, 3, 4, 5, 6, 7, 8,
9, 10
2010 Chip Size
ULRG15
ULRG1
ULRG2
ULRG25
ULRG3
ULRB1
Black
ULRB2
2
Green
Green
1.5
1
2
2.5
3
1
2512 Chip Size
Notes:
1.Black coating = wave or IR reflow soldering; Green coating = IR reflow solder. Wave reflow - solder mask must match the W and D dimensions on page 2
of data sheet. 2Non-listed resistance values available (contact factory). For non-listed resistance values above 20 mΩ, please refer to our LRC / LRF series.
3 Package sizes 2010 and 1206 with the green coating are uncoated on the top surface and unmarked for resistance value.
Environmental Data
Test
Short Term Overload (5x rated power for 5 seconds)
Load at rated power (1000 hours cyclic load @ 70°C)
Temperatature Cycling (-55°C to +150°C; 1000 cycles)
Dry Heat (+170°C, no load; 1000 hours)
Resistance to Solder Heat (260°C for 10 seconds)
Solderability (235°C for 2 seconds)
Resistance to Solvents
Operating Temperature
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
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Embedded System
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